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Physics-

General

Easy

Question

Assertion :We cannot produce a real image by plane or convex mirrors under any circumstances
Reason : The focal length of a convex mirror is always taken as positive

If both assertion and reason are true and the reason is the correct explanation of the assertion
If both assertion and reason are true but reason is not the correct explanation of the assertion
If assertion is true but reason is false
If assertion is false but reason is true

The correct answer is: If assertion is false but reason is true

Related Questions to study

An organic compound reacts with $P C l subscript 5$ to give. The compound with sodium metal gives $n minus b u tan e. space T h u s comma space A space a n d space B space a r e colon$

An organic compound reacts with $P C l subscript 5$ to give. The compound with sodium metal gives $n minus b u tan e. space T h u s comma space A space a n d space B space a r e colon$

chemistry-General

If f : R → R is continuous and differentiable function such that $not stretchy integral subscript negative 1 end subscript superscript x end superscript blank$ f(t) dt + f¢¢¢ (3) $not stretchy integral subscript x end subscript superscript 0 end superscript d t equals not stretchy integral subscript 1 end subscript superscript x end superscript blank$ t³
dt – f ¢ (1) $not stretchy integral subscript 0 end subscript superscript x end superscript blank$ t² dt + f ¢¢ (2) $not stretchy integral subscript x end subscript superscript 3 end superscript blank$ t. dt, then the value of f ¢ (4) is :

If f : R → R is continuous and differentiable function such that $not stretchy integral subscript negative 1 end subscript superscript x end superscript blank$ f(t) dt + f¢¢¢ (3) $not stretchy integral subscript x end subscript superscript 0 end superscript d t equals not stretchy integral subscript 1 end subscript superscript x end superscript blank$ t³
dt – f ¢ (1) $not stretchy integral subscript 0 end subscript superscript x end superscript blank$ t² dt + f ¢¢ (2) $not stretchy integral subscript x end subscript superscript 3 end superscript blank$ t. dt, then the value of f ¢ (4) is :

Assertion : The refractive index of diamond is $square root of 6$ and that of liquid is $square root of 3$
If the light travels from diamond to the liquid, it will totally reflected when the angle of incidence is 30^o
Reason : $mu equals fraction numerator 1 over denominator sin invisible function application C end fraction$ where $mu$ is the refractive index of diamond with respect to liquid

Assertion : The refractive index of diamond is $square root of 6$ and that of liquid is $square root of 3$
If the light travels from diamond to the liquid, it will totally reflected when the angle of incidence is 30^o
Reason : $mu equals fraction numerator 1 over denominator sin invisible function application C end fraction$ where $mu$ is the refractive index of diamond with respect to liquid

physics-General

parallel

If f : [0, p] → R is continuous and $not stretchy integral subscript 0 end subscript superscript pi end superscript blank$ f(x) sin x dx = $not stretchy integral subscript 0 end subscript superscript pi end superscript blank$ f(x) cos x dx = 0, then the number of roots of f(x) in (0, p) is

If f : [0, p] → R is continuous and $not stretchy integral subscript 0 end subscript superscript pi end superscript blank$ f(x) sin x dx = $not stretchy integral subscript 0 end subscript superscript pi end superscript blank$ f(x) cos x dx = 0, then the number of roots of f(x) in (0, p) is

Assertion : Different colours travel with different speed in vacuum
Reason : Wavelength of light depends on refractive index of medium

Assertion : Different colours travel with different speed in vacuum
Reason : Wavelength of light depends on refractive index of medium

physics-General

The following substance can be used as a raw material for obtaining alcohol:

The following substance can be used as a raw material for obtaining alcohol:

chemistry-General

parallel

Etherates are

Etherates are

chemistry-General

$E t h y l space a l c o h o l space r e a c t s space w i t h space H C l space b u t space n o t space w i t h space H C N space b e c a u s e colon$

$E t h y l space a l c o h o l space r e a c t s space w i t h space H C l space b u t space n o t space w i t h space H C N space b e c a u s e colon$

chemistry-General

Lucas reagent produces cloudiness immediately with:

Lucas reagent produces cloudiness immediately with:

chemistry-General

parallel

The product is

The product is

chemistry-General

Alloys of which metal are light and strong and are used in the manufacture of aeroplane parts?

Alloys of which metal are light and strong and are used in the manufacture of aeroplane parts?

chemistry-General

The right order of the solubility of sulphates of alkaline earth metals in water is

The right order of the solubility of sulphates of alkaline earth metals in water is

chemistry-General

parallel

$A space g a s space r e a c t s space w i t h space C a O space a n d space n o t space w i t h space N a H C O subscript 3 space i s colon$

$A space g a s space r e a c t s space w i t h space C a O space a n d space n o t space w i t h space N a H C O subscript 3 space i s colon$

chemistry-General

If point O is the centre of a circle circumscribed about a triangle ABC. Then $Error converting from MathML to accessible text.$

If point O is the centre of a circle circumscribed about a triangle ABC. Then $Error converting from MathML to accessible text.$

Which pair of the following chlorides do not impart colour to the flame?

Which pair of the following chlorides do not impart colour to the flame?

chemistry-General

parallel

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